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Smithson Tennant
Smithson Tennant 1761-1815, English chemist. In 1796 he proved, by burning a diamond, that the diamond consists solely of carbon. In 1804 he announced his discovery of osmium and iridium.
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oxygen
oxygen gaseous chemical element; symbol O; at. no. 8; at. wt. 15.9994; m.p. -218.4°C; b.p. -182.962°C; density 1.429 grams per liter at STP; valence -2. The existence and properties of oxygen had been noted by many scientists before the announcement of its isolation by Priestley in 1774. Sc...
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John William Draper
John William Draper 1811-82, American scientist, philosopher, and historian, b. near Liverpool, England, M.D. Univ. of Pennsylvania, 1836. In 1839 he became professor of chemistry at the Univ. of the City of New York. He helped organize the medical school of the university, became its professor of ...
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Jan Masaryk
Jan Masaryk , 1886-1948, Czechoslovak diplomat, son of Thomas G. Masaryk. He was (1925-38) Czechoslovak minister to Great Britain, and in London he became (1940) foreign minister in the Czechoslovak government in exile headed by Eduard Beneš after the German occupation of Czechoslovakia. Duri...
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Americana
Americana term used to describe material printed in or about the Americas, or written by Americans; usually restricted to the formative period in the history of the two continents. Thus the letter written by Columbus in 1493 in which he announces the discovery of the Indies is the earliest item. ...
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Angelus
Angelus [Lat.,=angel], daily prayer of the Roman Catholic Church, said usually three times daily, as announced by a bell, traditionally at six in the morning, at noon, and at six in the evening. It is said in honor of the Incarnation and consists of three repetitions of the Hail Mary together with ...
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Bay Psalm Book
Bay Psalm Book common hymnal of the Massachusetts Bay colony. Written by Richard Mather, John Eliot, and Thomas Weld, it was published in 1640 at Cambridge as The Whole Book of Psalms Faithfully Translated into English Metre. The announced effort of the authors to make a literal rendering at the ...
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Jacobus Cornelius Kapteyn
Jacobus Cornelius Kapteyn , 1851-1922, Dutch astronomer. He was an authority on the Milky Way, of which he made notable statistical studies; he constructed a model of the galaxy known as the "Kapteyn universe." He computed the positions of the stars of the Southern Hemisphere photographed by Sir...
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Andreas Sigismund Marggraf
Andreas Sigismund Marggraf , 1709-82, German chemist, a pioneer in analytical chemistry. He proved that alumina, magnesia, and lime are distinct earths, found (1743) an improved method for the commercial preparation of phosphorus, and isolated (1746) zinc. In 1747 he announced his discovery of sugar...
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Riccardo Muti
Riccardo Muti , 1941-, Italian conductor. Principal conductor of the Maggio Musicale (1969-81) in Florence and of the Philharmonia Orchestra (1973-82) in London, he became (1977) principal guest conductor of the Philadelphia Orchestra and succeeded (1980) Eugene Ormandy as its musical director, a ...
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